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Flight Reliability

F9 4209 · Frontier Airlines

Cleveland → Atlanta (CLE–ATL)

66
Usually Fine
WanderNerd Reliability Score
70%
Arrive within 15 minutes
15 min
Average arrival delay
2.3%
Cancelled
2 min
Median arrival delay

Based on 263 historical flights. Data through May 2026.

What the data says

3–6 PM has a slight edge.

Departures between 3–6 PM arrived on time 72% of the time, against 69% between 6–9 PM.

Friday is doing you no favors.

F9 4209 arrived on time 86% of the time on Tuesdays and just 57% on Fridays. That gap is worth planning around.

Well behind the CLE–ATL route.

F9 4209 arrived on time 70% of the time, versus 86% across the CLE–ATL route.

A bit behind the Frontier Airlines network.

F9 4209 arrived on time 70% of the time, versus 73% across the Frontier Airlines network.

The breakdown

On-time by weekday
  • Mon61%(38 flights)
  • Tue86%(36 flights)
  • Wed80%(30 flights)
  • Thu72%(43 flights)
  • Fri57%(37 flights)
  • Sat67%(33 flights)
  • Sun68%(40 flights)
On-time by departure window
  • 3–6 PM72%(29 flights)
  • 6–9 PM69%(228 flights)
On-time trend by month
61%
May

Jun 60% → May 61% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202560%25
July 202561%31
August 202569%29
September 202590%30
October 202581%26
November 202552%21
March 202679%24
April 202671%28
May 202661%31
Departures on time
73%
Diverted
0%
Flights flown
257
Months covered
11

Same route, other flights

Keep nerding

Based on 263 historical flights, because apparently we checked. Historical flight data: U.S. Bureau of Transportation Statistics, June 2025 – May 2026. Data through May 2026. How we calculate this.